In 2013, with Federico Neeva Orrù, he created a versatile octagonal multiline display family, Vasarely, named after optical artist Victor Vasarely.

In 2014, Simon designed the manicured sans typeface family Helado together with Sabrina Ekecik and Benjamin Campana. Vagtur (a tweetware hybrid of VAG Rounded and Fette Fraktur) was co-designed with Sabrina Ekecik.